بررسی وضعیت متیلاسیون ژن‌های 1SFRP و 2SFRP در بیماران مبتلا به لوسمی میلوییدی حاد در زمان تشخیص

نوع مقاله : مقاله های پژوهشی

نویسندگان

1 دانشجوی کارشناسی ارشد، گروه هماتولوژی، دانشکده‌ی پیراپزشکی، دانشگاه علوم پزشکی تهران، تهران، ایران

2 مرکز تحقیقات خون، انکولوژی و پیوند سلول‌های بنیادی، دانشگاه علوم پزشکی تهران، تهران، ایران

چکیده

مقدمه: لوسمی میلوییدی حاد (AML یا Acute myeloid leukemia) گروه هتروژنی از بدخیمی‌های هماتولوژیک می‌باشند که عوامل زیادی در پاتوژنز آن‌ها دخیل هستند. متیلاسیون DNA در نواحی CpG (Cytosine-phosphate-guanine) پروموتور بعضی از ژن‌ها نقش مهمی در شروع و پیشرفت تومورها دارد. پروتئین‌های SFRP (Secreted frizzled-related protein)، تنظیم کننده‌های منفی مسیر سیگنالینگ Wnt می‌باشند. در مطالعه‌ی حاضر، وضعیت متیلاسیون ژن‌های 2SFRP و 1SFRP در بیماران AML تازه تشخیص داده شده و افراد سالم مورد بررسی قرار گرفته است.روش‌ها: نمونه‌ی خون محیطی 43 بیمار AML در زمان تشخیص و 25 فرد طبیعی به عنوان شاهد جهت بررسی وضعیت متیلاسیون دو ژن 2SFRP و 1SFRP مورد بررسی قرار گرفت. برای بررسی وضعیت متیلاسیون ژن‌های 2SFRP و 1SFRP از تکنیک MSP (Methylation specific- PCR یا Methylation specific- Polymerase chain reaction) استفاده شد. از آزمون Mann–Whitney U برای بررسی ارتباط بین هایپرمتیلاسیون ژن‌های 2SFRP و 1SFRP با پارامترهای بالینی بیماران استفاده شد.یافته ها: برای ژن 1SFRP در افراد بیمار از 43 نمونه 13 مورد (2/30 درصد) و برای ژن 2SFRP از 43 نمونه 9 مورد (9/20) هایپرمتیله بود. در هیچ کدام از نمونه‌های شاهد که مربوط به افراد سالم بودند، متیلاسیون این دو ژن مشاهده نشد. بیشترین هایپرمتیلاسیون 1SFRP (028/0 = P) و 2SFRP (004/0 = P) در زیر گروه 0M مشاهده شد.نتیجه‌گیری: متیلاسیون ژن‌های 2SFRP و 1SFRP همانند بسیاری از سرطان‌های توپر، در بیماران مبتلا به AML نیز دیده می‌شود. از این رو احتمال می‌رود که متیلاسیون این ژن‌ها در شروع بیماری نقش داشته باشد.

کلیدواژه‌ها


عنوان مقاله [English]

Study of SFRP1 and SFRP2 Genes Methylation Status in Patients with De Novo Acute Myeloblastic Leukemia

نویسندگان [English]

  • Ali Ghasemi 1
  • Shahrbanoo Rostami 2
  • Nasrin Alizad-Ghandforosh 1
  • Abbas Ghotaslou 1
  • Sadegh Abbasian 1
1 MSc Student, Department of Hematology, School of Allied Medical Sciences, Tehran University of Medical Sciences, Tehran, Iran
2 Hematology-Oncology and Stem cell Transplantation Research Center, Tehran University of Medical Sciences, Tehran, Iran
چکیده [English]

Background: Acute myeloid leukemia (AML) is a heterogeneous group of hematologic malignancies with great variability in the pathogenesis and clinical course. DNA methylation of CpG islands within the promoters of specific genes may play roles in tumor initiation and progression. Secreted frizzled-related proteins (SFRPs) are negative regulator of the Wnt signaling pathway. In the present study, we compared the methylation status of SFRP1 and SFRP2 genes promoter in patients with AML and healthy individuals.Methods: In peripheral blood from 43 patients afflicted with de novo AML and 25 healthy controls, isolated DNA was treated with sodium bisulfite and analyzed by methylation-specific polymerase chain reaction (MSP) with primers specific for methylated and unmethylated promoter sequences of the SFRP1 and SFRP2 genes. We used Mann-Whitney u-tests to investigate the correlation between SFRP1 and SFRP2 genes hypermethylation and clinical parameters.Findings: The frequency of aberrant hypermethylation of SFRP1 and SFRP2 genes promoter in patients with AML was determined 30.2% (13/43) and 20.9% (9/43), respectively. In addition, for all subjects in control group, methylation of SFRP1 and SFRP2 genes promoter were negative. Patients with M0 subtype of FAB-AML had the highest incidence of hypermethylation of SFRP1 (P = 0.028) and SFRP2 (P = 0.004) genes promoter.Conclusion: The present study showed that, like many solid tumors, SFRPs genes methylation also occurs in AML. Therefore, the methylation of these genes may play a role in leukemogenesis initiation.

کلیدواژه‌ها [English]

  • Acute myeloblastic leukemia
  • SFRP gene
  • DNA Methylation
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